package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioProperties;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {
    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioProperties minioProperties;
    /**
     *  步骤1：判断桶是否存在
     *  步骤2：如果不存在则创建一个桶以及设置访问权限
     *  步骤3：向桶中传递文件
     *  步骤4：拼接返回的url地址
     */
    @Override
    public String uploadFile(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
//        步骤1：判断桶是否存在
        boolean bucketExists = minioClient.bucketExists(BucketExistsArgs.builder().bucket(minioProperties.getBucketName()).build());
        if (!bucketExists){
//            步骤2：如果不存在则创建一个桶以及设置访问权限
            minioClient.makeBucket(MakeBucketArgs.builder().bucket(minioProperties.getBucketName()).build());
            String policy = """
                        {
                          "Statement" : [ {
                            "Action" : "s3:GetObject",
                            "Effect" : "Allow",
                            "Principal" : "*",
                            "Resource" : "arn:aws:s3:::%s/*"
                          } ],
                          "Version" : "2012-10-17"
                        }""".formatted(minioProperties.getBucketName());
            minioClient.setBucketPolicy(SetBucketPolicyArgs.builder().bucket(minioProperties.getBucketName()).config(policy).build());
        }
//        步骤3：向桶中传递文件
        /*
            todo:文件重名的问题file.getOriginalFilename()
            todo:文件直接放在桶中太乱的问题
                20240401/uuid_对象名.png
         */
        String objectName = new SimpleDateFormat("yyyyMMdd").format(new Date())+ "/" + UUID.randomUUID().toString().replaceAll("-","") + "_" + file.getOriginalFilename();
//        minioClient.uploadObject() 传递本地存在的文件 C D F ....盘中存在的  filename = 文件的地址
//        minioClient.putObject()   传递内存中存在的文件数据 | 字节数据
        minioClient.putObject(PutObjectArgs.builder()
                .bucket(minioProperties.getBucketName())
                .object(objectName)
                .stream(file.getInputStream(), file.getSize(), -1)  //-1 代表不切割原有文件大小
                .contentType(file.getContentType())
                .build());


                return String.join("/", minioProperties.getEndpoint(), minioProperties.getBucketName(),objectName);
    }
}
